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    An evaluation of membrane properties and process characteristics of a scaled-up pressure retarded osmosis (PRO) process

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    Publication date
    2016-01-15
    Author
    He, W.
    Wang, Y.
    Mujtaba, Iqbal M.
    Shaheed, M.H.
    Keyword
    Pressure retarded osmosis; Scaled-up; Membrane sensitivity analysis; Process characteristics; Operating conditions
    Rights
    © 2016 Elsevier B.V. Full-text reproduced in accordance with the publisher’s self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
    Peer-Reviewed
    Yes
    
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    Abstract
    This work presents a systematic evaluation of the membrane and process characteristics of a scaled-up pressure retarded osmosis (PRO). In order to meet pre-defined membrane economic viability ( ≥ 5 W/m2), different operating conditions and design parameters are studied with respect to the increase of the process scale, including the initial flow rates of the draw and feed solution, operating pressure, membrane permeability-selectivity, structural parameter, and the efficiency of the high-pressure pump (HP), energy recovery device (ERD) and hydro-turbine (HT). The numerical results indicate that the performance of the scaled-up PRO process is significantly dependent on the dimensionless flow rate. Furthermore, with the increase of the specific membrane scale, the accumulated solute leakage becomes important. The membrane to achieve the optimal performance moves to the low permeability in order to mitigate the reverse solute permeation. Additionally, the counter-current flow scheme is capable to increase the process performance with a higher permeable and less selectable membrane compared to the co-current flow scheme. Finally, the inefficiencies of the process components move the optimal APD occurring at a higher dimensionless flow rate to reduce the energy losses in the pressurization and at a higher specific membrane scale to increase energy generation.
    URI
    http://hdl.handle.net/10454/7967
    Version
    Accepted Manuscript
    Citation
    He W, Wang Y, Mujtaba IM and Shaheed MH (2016) An evaluation of membrane properties and process characteristics of a scaled-up pressure retarded osmosis (PRO) process. Desalination. 378: 1-13.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.desal.2015.08.022
    Type
    Article
    Collections
    Engineering and Informatics Publications

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